Want to win free pizza for 3.14 years? Here's how! - Spokane, North Idaho News & Weather KHQ.com

Want to win free pizza for 3.14 years? Here's how!

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PIzza Hut is giving away free pizza… for 3.14 years exactly; all you have to do is solve a math problem. PIzza Hut is giving away free pizza… for 3.14 years exactly; all you have to do is solve a math problem.
KHQ.com -

It's the one day out of the year devoted to math enthusiasts, but now it's for math enthusiasts that love pizza, too! 

In honor of "Pi Day" (March 14 -> 3.14), Pizza Hut is giving away free pizza for 3.14 years, but of course they aren't going to make it easy for you. On Pizza Hut's blog, they posted 3 math problems created by Princeton professor John Conway, and if you get one of them right you will be rewarded with free cheesy saucy goodness for 3.14 years, or 1,146.1 days to be exact. Whoa! 

OPTION A: 

I’m thinking of a ten-digit integer whose digits are all distinct. It happens that the number formed by the first n of them is divisible by n for each n from 1 to 10. What is my number?

OPTION B: 

Our school’s puzzle-club meets in one of the schoolrooms every Friday after school.

Last Friday, one of the members said, “I’ve hidden a list of numbers in this envelope that add up to the number of this room.” A girl said, “That’s obviously not enough information to determine the number of the room. If you told us the number of numbers in the envelope and their product, would that be enough to work them all out?”

He (after scribbling for some time): “No.” She (after scribbling for some more time): “well, at least I’ve worked out their product.”

What is the number of the school room we meet in?”

OPTION C:

My key-rings are metal circles of diameter about two inches. They are all linked together in a strange jumble, so that try as I might, I can’t tell any pair from any other pair.

However, I can tell some triple from other triples, even though I’ve never been able to distinguish left from right. What are the possible numbers of key-rings in this jumble?

If you think you have the answer to any of these problems and want to take a stab at them, submit your answers HERE.

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